208 PITTONIA. 
on the whole, it is only because the achenes are striated ; 
but in habit, in texture of the achenes, and the important 
characters of the style, there is the widest divergence be- 
tween them, while habitally they are totally different. My 
judgment is that either one of the propositions thus alluded 
to is worse than leaving the plants where they were under 
Ranunculus. 
I think that the species of HArLERPESTES are at least three; 
though the opinion that they are all geographical variations 
of one has its advocates. 
H. satsueinosa. Ranunculus salsuginosus, Pallas, Reise, 
iii. 213 (1778). An Asiatic plant, much smaller than the 
rest of the genus, with small entire or 3-dentate leaves and 
1-flowered scapes. 
H. CYMBALARIA. Ranunculus Cymbalaria, Pursh, Fl. ii. 
392 (1814). Ozygraphis Cymbalaria, Prantl, (1891). Cyr- 
torhyncha Cymbalaria, Britton (1894). Very common in 
western North America throughout the mountainous and 
alkaline distriets; the leaves subcordate-ovate and crenate 
all around the margin; scapes often 6 inches high and 
usually with several flowers; the heads of achenes oval or 
oblong. 
H. TRIDENTATA. Ranunculus tridentatus, HBK. ex DC. 
Syst. i, 252 (1818). Plant of Mexico and southward, said 
to be distinguished from the last by 3-dentate leaves, and 
scapes mostly 1-flowered. 
PERITOMA. 
DC. Prodr. i, 237 (1824). Atalanta, Nutt. Gen. ii, 73 
(1818), not of Correa (1805). Cleome species of more recent 
authors. 
